<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="UTF-8" />
    <meta name="viewport" content="width=device-width, initial-scale=1.0" />
    <title>Tree Component with Icons</title>
    <style>
      body {
        background-color: #000;
        font-family: Arial, sans-serif;
        padding: 20px;
      }
      .tree {
        list-style-type: none;
        padding-left: 20px;
      }
      .tree-item {
        margin: 10px 0;
        position: relative;
        display: flex;
        align-items: center;
      }
      .tree-item::before {
        content: "";
        position: absolute;
        top: 15px;
        left: -20px;
        border-left: 2px solid #1cd0e0;
        height: 100%;
      }
      .tree-item::after {
        content: "";
        position: absolute;
        top: 15px;
        left: -20px;
        border-top: 2px solid #1cd0e0;
        width: 20px;
      }
      .label {
        display: inline-block;
        background-color: rgba(28, 208, 224, 0.3);
        color: #ffffff;
        padding: 5px 15px;
        margin-left: 5px;
        border-radius: 5px;
        text-shadow: 1px 1px 2px #000;
      }
      .icon {
        width: 30px;
        height: 30px;
        background-color: rgba(255, 255, 255, 0.1);
        display: flex;
        justify-content: center;
        align-items: center;
        border-radius: 50%;
        margin-right: 10px;
      }
    </style>
  </head>
  <body>
    <ul class="tree">
      <li class="tree-item">
        <div class="icon">📍</div>
        <span class="label">站点拥挤度</span>
      </li>
      <li class="tree-item">
        <div class="icon">📡</div>
        <span class="label">周边查询</span>
      </li>
      <li class="tree-item">
        <div class="icon">🗺️</div>
        <span class="label">路径规划</span>
      </li>
      <li class="tree-item">
        <div class="icon">💻</div>
        <span class="label">站控设施</span>
      </li>
    </ul>
  </body>
</html>
